For Gem Enthusiasts

Deep-cut gems like Barions may not fit in standard ring mountings. Jewelers can try to find special mounts or custom solder a mount from pre-made…

Obsidian is the most common form of natural glass and occurs in many attractive varieties. Since prehistoric times, people have used this material…

The Duplex II and Rayner Dialdex both make excellent refractometers for gemologists. How do they compare head-to-head? Learn more from our review.…

Phenomenal gems seem to do magical things with light. Learn the science behind optical effects like cat’s eyes and star stones and how to judge…

Gem species are mineral species prized for their durability and beauty. Learn how chemical formulas and crystal structures define species and…

Named after the color of sea water, aquamarine is the blue to blue-green member of the beryl family. Readily available and moderately priced, the…